ABSTRACT
A world-wide network of gummed film stations was established
to monitor fallout following Operation Castle. Although meteorological data were voor, a general connection of troroscheric flow
patterns with observed fallout was avident. There was a tendency for
debris to remain in trorical latitudes, with incursions into the
terperate regions associated with meteorological disturbances of the
predominantly zonal flow. As the season advanced, such incursions
became more evident.
Cutside of the tropics, the southwestern United
States received the greatest total fallout,about five times that
received in Japan.
.
The maximum fallout on any day at an individual station in the
United States, corrected to sampling day, was 200,000 d/m/f£t?,
It is concluded that the probability of early fallout in
inhabited regions would be reduced by holding Pacific test serias
in the winter months.